[tz] macOS implements Links with file copies?

[Deborah Goldsmith]

Old versions should be removed at some point.

Thanks,
Deborah

> On Feb 13, 2021, at 1:11 AM, Guy Harris <gharris at sonic.net> wrote:
> 
> On Feb 12, 2021, at 4:56 PM, Deborah Goldsmith <goldsmit at apple.com> wrote:
> 
>> /var/db/timezone/zoneinfo is also a soft link:
>> 
>> % ls -l /var/db/timezone/zoneinfo 
>> lrwxr-xr-x  1 root  wheel  38 Feb  8 21:00 /var/db/timezone/zoneinfo -> /var/db/timezone/tz/2021a.1.0/zoneinfo
> 
> So how many /var/db/timezone/tz/{version} tzdbs are kept around?
> 
> 	$ ls /var/db/timezone/tz
> 	2020d.1.0	2020f.1.0	2021a.1.0
> 
> And why are older versions kept around?